399179920

素因数分解:

$2^4\times 5^1\times {\mathrm{2161}}^1\times {\mathrm{2309}}^1$

素因数の和:4483

約数の個数: 40

約数和(自身を含む): 928924920

約数和(自身を除く): 529745000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2161, 2309, 4322, 4618, 8644, 9236, 10805, 11545, 17288, 18472, 21610, 23090, 34576, 36944, 43220, 46180, 86440, 92360, 172880, 184720, 4989749, 9979498, 19958996, 24948745, 39917992, 49897490, 79835984, 99794980, 199589960, 399179920]

約数ペア:

[(1, 399179920), (2, 199589960), (4, 99794980), (5, 79835984), (8, 49897490), (10, 39917992), (16, 24948745), (20, 19958996), (40, 9979498), (80, 4989749), (2161, 184720), (2309, 172880), (4322, 92360), (4618, 86440), (8644, 46180), (9236, 43220), (10805, 36944), (11545, 34576), (17288, 23090), (18472, 21610)]